Wood-paving.



No. 829,002. PATENT'BD AUG. 21, 1906. J. DUFFY.

WOOD PAVING.

AYPLIOATIDN IILED JAN.23. 1906.

V \V' a @A A6 A WWI; fiwenzwm UNITED STATES PATENT OFFICE.

WOOD-PAVING.

Specification of Letters Patent.

Yatented Aug. 21, 1906.

Application filed January 23, 1906. Serial No. 297,446.

To all whom zit ntwy normal-n.-

Be it known that l Josnrn Dorm, llooring and paving contractor, asubject ol' the King of Great Britain and lrelaud, residing atGainsborough ltoad, Victoria Park, N. it, in the county of London,England, have invented certain new and useful improvements inewd-Paving, of which the following is a specification.

This invention has reference to the type of wood-pavin wherein individual blocks therefor are made up of an aggregation of a number ofseparate sections or slices each of which has the form of a rectaligularparallelo iped. Then when a sullicient number of t iese separateportions have been assembled together to make the desired length andWidth of paving-block to be laid the aggreated sections are securedtogether, so as to form the complete block.

The object of the invention and the essential feature thereof is toelleet the locking together of the component portions of the completedblocks in a much more eil'ective and at the same time more economicalmanner than that hitherto effected.

The accompanying drawings illustrate the improved construction ofcomposite wood paving-block forming the salient features of myinvention.

Figure 1 is a plan view with the block inverted, and Fig. 2 across-section. Fig. 3 is a side elevation, and Fig. 4 a longitudinalsection, of a block. Fig. 5 is a cross-section of a slight modificationof block. Fig. 6 is a side elevation, and Fig. 7 an inverted plan, of ablock used in. connection with the grouting of the aving-blocks afterbeing laid.

T 0 separate sections or slices a forming the completed block haveformed in their bases one or more saw-cuts, by preference two, such as bb, which pass 11 Ward to a predetermined height, being pre erablyinclined in opposite directions. These saw-cuts are in correspondingpositions in each section, so as to lie in a straight line when thesections are ut together. Then when the requisite num er of separatepieces to form a complete block have been assembled together a ocking orbonding bar or strip b, of hard Wood or metal or other suitable materialof a length equal to that of the block, is forced into each of thesaw-cuts or slots, the looking-bar being of the requisite gage, section,and configuration to insure the necessary 1 amount (11' side li'ictionand rigidity to efl'ectllallv lock the whole together.

The. locking or bonding bars are preferably arranged so that theyproject at one, end of the block and fall short of the other end to an.equal amount, as at c r", Figs. 3 and 4. When placed in position, suchcomposite. bloeks will be to a certain extent tied to one another by thelocking-bars, which will thus serve the double purpose oi uniting thecomponent parts ol the blocks and assisting in holding the said. blocksin place.

l. am aware that in connection with woodbloek flooring andparqlu-t-liooring it has been previously proposed to obviate the11ccessity for preparing a special foundation of asphalt or bitumen byemploying wood panels or squares having waterproof baekings and that ithas also been proposed to form the under surface of the flooring panelor square with grooves in which are secured tongues, which also enterand are secured in corresponding grooves formed in the said watcrnoofbacking, the object being that when laid as a llooring moisture shall beprevented penetrating troni below, and also to allow the flooring panelsor squares being washed without tear of the flooring bulging or becominguneven, owing to the swelling of the wood.

I am also aware that in connection with wood-paving the blocks for whichconsist of a plurality of sections or slices it has been proposed tosecure the separate pieces together by framing a groove along each sideof the block, within each of which grooves is inserted and driven a flatsteel or like dog having a spike at each end and also one or morebetween these end spikes.

Figs. 6 and 7 have reference to the means used for the grouting of thepaving-blocks after being laid. It is at )resent the usual practiceafter laying the blocks to floodthe surface of the paving with plasticgrout, the object being to fill all joints and render them waterproof.With a view therefore to thoroughly insure the accomplishment of thisthe slots or grooves d of any desired shape are formed in the sides orends of the blocks or in some cases of the sections or slices of whichthe blocks are made up. Those slots or grooves serve as ducts orconduits for conveying and storing the plastic grout. By this provisiona thoroughly water-tight juncture and uniform surface is secured, andjoints which would probably open if any shrinkage formed at an anglewith the base of same and took place are maintained water-tight. assingupward thereinto; and, bonding or In Fig. 5 the saw-cuts b are formed atanocking bars fitting tightly in the said sawgles in a reverse directionto those shown in cuts. 15

5 Fig. 2. In Witness whereof I have hereunto set my Having now fullydescribed the nature of hand in the presence of two Witnesses.

my said invention, what I claim, and desire JOSEPH DUFFY to secure byLetters Patent, is

In wood-paving the combination of a pln- Witnesses:

m rality of slices or segments of blocks joined FREDERICK THOMAS MEEKtogether to form separate sections, saw-cuts ARTHUR GEORGE MORRIS.

